Question: When did Anna Akhmatova marry Nikolay Gumilev?
Paraphrase: What was the wedding date of Nikolay Gumilev and Anna Akhmatova?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q80440 p:P26 ?s . ?s ps:P26 wd:Q311033 . ?s pq:P580 ?value}